Machine for severing plaster board



J.'SCHUMACHER MACHINE FOR SEVERING PLSTER BOARD May 4,1926. 1 n 1,583,188-

Filed June so, 1925 4 sheets-sheet 1 JNVENTOR.

.ja/m y Sch/marie( 'A ATTORNEYS.

May 4, 1926.

J. SCHUMACHER MACHINE FOR SEVERING PLASTER BOARD m T EA m www a V/m/m h WC T S I l l Il. 5 M wv llllllll e m ,mw A.

nssanss May 4 1926.

J. SCHUMA'CHER MACHINE FOR SEVERING PLASTER BOARD Filed June 30, 1925 4 Sheets-Sheets A TTORNEYS.

May `4 19.26.

.1, scHUMAcHER MACHINE FOR SEVERING PLASTER BOARD Fild June so. 1925 4 Sheets-Sheet 4 f M wmwm V .0 MMM JW 1 gl S JoHN-.scHUMAGHEn, 'or Los ANGELES, CALIFORNIA.

'Merriam ron savannas rrAsTnn BOARD.

I' Application manne so, 1925. sensi N. 4o,551.

' 'cuzeafthe.United-stammte resident of LosV Angeles, inthe countypo'f Los Angeles,

` t State of California,`have invented new and' useful Improvements in Machines for Severing Plaster Board, which'the following is a specification. Y

This invention 'relates Ito apparatus for l feeding and severing into suitable lengths a 'Yao continously advancing product of sheet form without stopping or altering the progress of the product. The embodiment ofthe in vention disclosed herein is intended' for the` division of a strip of plaster board which is' being continuously formed and advanced, Athe division occurriiigduring advance so las to form panels ready foi" stacking and further treatment. l f' 'Ifhe'objectsofthis invention are first, to provide a machine wherein a cutter is vreciprocated longitudinally of the advancing product, the cutter being 'moved transversely of the product during its. travel with the '25 latter so as to sever the same, and which will be maintained inoperative during movement in the reverse direction; second, to provide.

a cutter and-mounting" therefor which is caused to travel at substantially the same speed as the product; and third, to provide details of construction, whereby a durable, simple mechanism, positive in operation is obtained.

The present invention is intendedto be interposed in the line of conveying mech-A anism which receives a strip' of plaster board being continuously formed and adf Jranced The objectsabove. set forth to gether with other objects and corresponding o accomplishments' are obtained by'vmeansof the embodiments of my invention illustrated in the accompanying drawing, in which:

Fig. 1 is aside elevation of a portion of a plaster b oard machine showing the cutting V.mechanisiii;v Fig.'2 is a section as seen `on the line 2--2 of Fig. 1;`l Fig. 3 is an enlarged section in elevation through the control valve forthe hydraulic motor for returning the cutting mechanism; Fig. 4 is a as seen on Athe line 6`6 of Fig.v 5;,

diagrammatic plan view of the means for moving. the cutters A transversely of the plan view of the structure shown in Fig. 1; Fig. 5 is 4a section as seen von the line 5-'5 of Fig. 4; .,Fig. 6 isa fragmentary section Fig. 7

, tions.

,Shown passedoverA a roller 11. fveyorladvancesja' vstrip of plaster board which4 is formed by mechanism not show'nli.V V

.such as forming a soft green board. It is now the and'Jose to automatically belt 10, being .slid

board; and Figa-8 and'9l are viewssimilar to showing the parts .indifferent posi-v f Referring more particularly to the drawing, avconveyorjbelt 10 of endless type is This convherein' and'forming no -portion of the-pres!A4 ent'jinvention.- .-Afplaster board of this character comprises ai'rupper and lower sheet of paper, between which a. plaster gypsum has been interposed, thereby practice to cut this board into lengths vby means of a cutter which is manually oierated. A cutter'of this type is disclose j in P tentl 1,197,553, issued to John Schumacher h E. Schumacher, September 5, `T e present invention is intended perform cutting peration.

In line witliroller roller`12 an endless conveyor belt 13 passed thereover. There is a ap betweenrollers 11 and 12 which is bridged 'by a` plate 14. Plaster board in a stri is advanced by conveyor across plate 14 whereon it is severed intosuitable lengths forming panels, and these panels are passed onto conveyor belt 13 which advances them to the point of delivery. The severing mechanismoperates at the bridge plate 14. This plate is preferably made of some soft and ductile metal,l such as lead or a com osition thereof.

Mounted at the sides of t e plate 14 and supported bythe frame of the machine so as to be stationa are racks 15. A :truck is arranged to ri e upon tracks 51'6. This truck comprises side plates 17-provided with. wheels 18.` The side lates hare forwardly extending arms 1'9` w ich .end forwardly in plates forming portions of nism for the. truck. This tractor mechanisni .will be later described. 'Spanning the side a tractor mechaplates 17 are shafts 20 and 21. .Aixed to the ends of `the shafts are gear wheels riding upon the racks 15.. Inthis vmanner the truck is compelled to travel in alignment. Extending between the .side `plates 17 are a cutter carriage ,24 which may slide thereon. The carriage vconsists of a top plate l25 and of legs 26 formed at .the sides with recesses to receive the rails asbest shown in Fig. -5.

vcross bars 22 and 23 which serve as vrails for l l It `will be apparent that the carriage may be moved transversely -of the, machine, and the truck carrying the carriage may be moved .longitudinally thereof.v Journalled in the carriage andsuspended therefrom is a disk cutter 28. The edge of the cutter is disposed flush with the surface of bridge plate 14, or

' at the opposite side of the truck. The lower beat of the belt is passed about a pulley 33- it may enter thebody thereof and form a kerf in which to travel. The cutter may. be operated from a motor 29 mounted on the truck' at one end thereof and. having a drive pulley over which is passed a. belt 31. Belt' 31 is passed over a pulley 32 journalled journalled in the carriage and then over a pulley 34 fixed to. the shaft drivingthe cut` shafts 35 and 36. Journalled upon't A chain 42 are passed ,along the opposite sidesv l.ri age backwardlyzr'- y lter 28. This structure is best shown in Fig.

l.3 9 and 40 is a sprocket wheel 4l. Passedabout `the sprocket wheels last described is a sprocket chain 42 -anchored. at both ends to the: truck. Opposing leads of Lthe bight of vof a clutch device on'the carriage plate 25. The. clutch mechanism 1 comprises a catch finger 43 suitablypivoted and having on op.- posite sides thereofl oppositely directed notches 44 and 45'. These notches 'are arranged to be engaged by linger abutments 46 vand 47 xed to the'chain 42. It is obvious thatupon moving the truck'back and forth,

chain 42fwill be caused' to travel over the carri e first-in one direction and then in' the ot er as indicated in Figs. 7 8, and 9. Springs 48 tend to maintain the catch, 43 in central .position'as shown in Fig. 8. The

abutments 46 and 47 have bevelled ends arrangedto engage notches 44 and 45, respectivel Suppose'the truck is being moved `in t` e direction of the arrow in Fig. 7. The chain 4 2 will be travelling in the directionindicated by the arrow ;a, abutment 47 will engage with catch 43 .resting in notch 45 and -wlll thereby move. the carriage in the direction a. The proportions are such that the carriage will have Vcompleted itsv travel at the time the truck reaches the end of its travel. The truck is 'then returned, travellingin the direction of the arrow B of Fig. 8. This causes the chain to travel in the direction of the arrow b. .Abutment 47 is `free to .ride out of notch v45 in the -has an elongated opening 1n catch',and the carriage will remain in position-during'the return ofthe truck. Abat-v ment 46 willl slide over the nose 'of catch' 43 so that it is in the position shown in-Fig.

9, at the end of the travel of' the truck. Return movementof the truck, 'as shown in Fig. 9 andindicated by arrow A will cause abutment 46 to' engage in rnotch 44 of the catch and return the carriage to the opposite side of the truck. It will be noticed that at the end of the travel of the carriage in either direction, it remains in position 1duringthe return of the truck. l

Tractor means is provid for moving the truck. This tractormeans is at the forward eend of arms 1 9, which terminate in plates49. Extending, between the plates is a shaftv 5 0. The tractor is provided with wheels 517 which'ride ,uponfrails 52. Fixed to the shaft 5 0 is an elbow lever 53. 'At opposite ends of the shaft 5.0 adjacent the plates are arcuate toothed latches 54 so arranged that rock ing of lever 53 will cause the latches to be rocked.. Upon each plate 49 are links 55 supporting a serrated grip bar 56. Each bar 56 is so hung, that when the links 55 are vertical, the' teeth onbar 56 will bein engagement with the belt 13. The teeth are of such form that movement of belt 13 .so as to discharge the plaster board thereon will tend to cause the teeth to bite into the beltrandf obtain a Dbetter hold thereon." lAt 'the forward end of eachgrip' bar is a head .57 disposed tdengage an abutment later described. Pivotal plate 49 is a lock lever 58.

y mounted upon each The lock lever' the lower end throughl which extends a pin 59 which is secured to a grip bar v56.

60 is secured to a plate at one end and to a grip bar at the other and tends to swing tension spring l the grip-bar downwardly against the belt i 13. Suppose that the grip bar is depressed so that it bites into the belt 13. Movement of the upper beat of the belt outwardly will cause the tractor be inbved with the belt,

and it will so move until it is released.

Extending across the machine at the dis- "charge end is a cross bar' 61. Slidably mounted in the .cross bar Iis an abutment 62 disposed in the -path of the heads 57. Compression springs 63 tend to hold the abutments in their outer position. The arrangement is such that the abutmentshave resiliency, against the abut-ments, moved storing up energy inthe springs and aiding in moving the grip bars 56 out of engagement with 'the belt. Movement of the grip bars out of engagement with the belt will cause thernto'swing androck the lock levers 58 so that the latter are swung and held in position by the latches 54.

They willI remain in this position until the and when the heads 57 v'ride' the latter will be'.

latches are elevated, which is effected by 1 30'? igseaiee lswingingthe elbow lever 5.3. Means-is prosingle acting hydraulic motor.

vided for returningv the truck to its inner `position. This means vcomprises a hydraulic motor shown in Figspl', 3, and 4.

Mounted upon a side bar16 is a hydraulic -Wh cylinder 64 provided with a plunger to which a plungenrod 65vis secured. The cylinder and plunger comprise parts of a 65 is fixed to a .bracket 6 6 -mounted on the ,.truclg. Thus, movement of the plunger will swinging the valve p lug 7l the exhaust line 69 connected to the Vvalve and an inlet line 70 leading to a source of fluid'` supply under pressure. It is obviousthat by hydraulic cylinder may be connected'- to the fluid supply under pressure or to the exhaust. F or. operation of the valve plug there isan arm 72 connected to the plug and secured to its end is an operating rod 73. y

' Mounted upon the voperating rod are "stops 74 and 75'armnged to -be engaged by the tappet 76 depending from the bracket 66. The stops are Aso arranged that they will be engaged by thetappet 4at the ends of travel of the truck. Thus, at one end of .the travel of the truck, valve 68 will be operated to connect the hydraulic cylinder with thel discharge, and at the other' end ofthe travel, the valve will operatedl to connect the hydraulic cylinder with the fluid under pressure. ,'Thisdattercondltion is effected when the truclr'reaches its outermost limit ofitravel. Means is thus provided for returning the truck to its inner position. 'The tractor serves to move the -truck from its inner to its outer position.

The tractor on its inner'movement has its grip .bars disposed 'out of` engagement with4 the belt, and they are locked in such position bythe lock levers 58 and the latches, 454. Means must'be provided for-releasing the lock levers to allow the grip 'bars to vdrop so. that' the tractor will takevhold of the belt and movethe truck `to its cute; position. vThis means may be .operated by the severed panels of boards in order that -the correct length of board may be Icut.

Pivotally mounted upon thecross bar 61 is' Vn elbow lever 77. It has a fingrwhich nia rest upon the belt as shown particular yin Fig.' 5'. The'finger 78. and the up er arm'of the elbow lever maybe adjusta ly connected by a tie rod 79. A cable coni nects elbow lever 77 and elbow lever 53. The

'length oft-h'is-cable is so adjusted that when the tractor and truck arein their innermost position, movement ofthe finger 78 I upwardly 'a slightdistance will cause the lever 53 to be swung and the latches 54 :to be raised so as .to release lock levers 58 linger 8, the elbow lever' 77 is\ 'sition 'as to permit latches 54 to Plunger ,rod

maybe eifected by the finger dropping into the unsevered strip.

transversely movable cutter,

cutter transversely,

belt. The movement of thenger`f78fto' a-distance fe ual tothe thickness of a plaster board is s en laster board is disposed benith' the7 in such polevers 58. Upon dropping'of the fin er 78 Vso that it `contacts .with the belt,` which the gap between plaster board panels just severed. There is'a drag of the un'severed strip of. plaster board upon the beltoonveying it. This 'drag is such that the plasterboard mOVesatfa slightly less speed than the belt.'4 When the-plaster board is severed', the panels are free to move'- with Vthespeed of the belt,v andthe gap between severed sections begins widening.` The. width ot this gap as the panels 4reach the tipof fingerl 78. i-s sufiicientto ermit the finger to drop therebetween. At t inner position and the movement 'of the" Enger will cause an elevation of-catch 54 and a release of the gri bar. The bar drops" and clutches the lt causing the l tractor to move the truck toits outer position. During movement of the truck to .its outer position, the carriage 24 is moved transversely. of the plaster board strip and 28-severs the same. When the truck reaches its `outer positiom-the abutments '62 engage the grip bar heads'and release the tractor from the belt.j The: hydraulic motor is then-operatedto return the cient to cause this operation.

retain lock l,

le moment finger 78 dropsv over 'the cut'edge of a plaster board panel, the truck` should bel in its truck. The newly cut panel 'travels fora little bit faster than This causes the gap 'to widen so that the nger may drop therebetween.' The face of the wardly, advancing edge thereof until a' ycut has beep reached.-

What I claim is:

nger 78 will ride on the surplaster board panel, and will'.` not drop over the 1 o 1. In anachine' for severing a advanc.-l ing strip while 1n motion, the combination of .a moving conveyor for ycontinuously' .ad-

vancing said strip,- a cutter mechanism movable 4with sald conveyor and havxng'fa means for mov# ing said .cutter mechanism with said conveyor and at .the same time moving said vand means operated *by said .strip in its travel to control movement' of said mechanism.l j

2. In a machine as specified in clann 1 means to return said mechanism to initial cutting position. v

.3,111 a machine for severing an ad-v vancing strigp while in motion, the combina;-- tion of a moving conveyr for continuously advancing saidv strip, a cutter 'mechanism movable with'saidconveyor and having a transversely movable cutter, meansact-uatel by travel of said mechanism with said conveyor to move 'said cutter transversely thereof, means-.for .moving said .cutter with means to return said .mechanism to initial 'cuttingk position. y 5.l In a machinefor severing an acl-- vancing strip Wliile in motion, the combination of amovingconveyor for continuously advancing saidstrip, a cutter truck movable With the conveyor, a cutter carriage trans- -versely movable on said truck, means operated by travel. of said truck to move said carriage transversely `thereoit upon advance of said truck and to? release rsaid carriage from'transverse movement upon return Tof said truck, means for advancing said 'truck withv said conveyor, and means operated by travel of saidstrip to control movenien'tpot said truck. 6. In a machine as speciied in "claim 5 means to return said truck to initiall cutting position. 'l c- 7. Ina machine for severing anadvancing strip of plaster board While in motion, the combination of a moving conveyor for continuously advancing said strip, a cutter mechanisml movable with said conveyor and having a transversely movable cutter, meansM actuated by travelof said mechanism witht said conveyor. to move said cutter trans-- versely thereof, means for moving said mechy anism With said conveyor, and means op-.'

erated'by a transverse edge of the board to control movemeiit of the said mechanism.

8. In-a machine-as specified in claim 7 means to return said mechanism to initialv cutting position. l

9. In a machine for severing an advanc- 4'5- ing strip of plaster board whilein motion,

the combination ofa moving yconveyorlfor continuously advancing said strip, a'cut'ter truck movable with said conveyor, a cutter carriage transversely movable on said truck, means operated by travel of said truck to move said carriage transversely thereof upon advance of said truck and to releasesaid carriage from transverse movement upon return of said truck, means for advancing said truck With said conveyor, and means operated by a' transverse edge otthe boardto control movement of said truck. Y

10. In a machine as specified in claim 9 means to return said truck to initial cutting position. i Y

11. In a machine for severing an advancing strip of plaster board while in motion, the combination of a moving conveyor for continuously. advancing said strip, a cutting mechanism movable with said conveyor and having a transversely movable cutter, means to cause said mechanism to travel therewith,

and means operated by said board-in its travel to couple said mechanism in its initial cutting 'position to said conveyor and to uncouple said mechanism at the end of its l cutting position. l

12. In a 'machineasspeciied in claimll means to return said mechanism to initial cutting posit-ion. c l

13. In a machine for severing an advanc- 4said conveyor-to move said cutter transversely thereof, means to couple said mechanism to" said conveyor to cause said mechanism to travel therewith, and means operated bysaidboard in its travel to couple 'ing strip of plaster board while in motion, l

said mechanism in its initial cutting position. to said conveyor and to uncouple said mechanism at the end of itsjcutting position..

.14. In a machine as'speciied in claim 13 means to return said mechanism to initial cutting position.

15. In a machine for severi'ngan advancing stripoi' plaster board whilev in'motiom.

the combination of a -moving conveyorfor continuously advancing' said strip,l a cutter trucl; movable with` said conveyor, a cutter carriage transversely movable on said truck, means operated by travel of said truck to move said carriage transversely thereof upon advance of said truck and to .release said carriage from transverse' movement upon A, return of said truck, means to couple said i 'truck' to said conveyor to cause said truck to travel with' said conveyor, and means operated by said board in its travel to .couple said truck in its initial cutting position to said conveyor and to uncouple said truck at the end of -its cutting position.

16. In a machine'as specified in claimY 15 `means to return said truck to initial' cutting said belt to move said cutter transversely thereof, a tractor for coupling said mecha.- nisin to said belt` comprising a grip bar disposed to be swung into engagement with said belt to `-couple said mechanism thereto and' to be swungout of'engagement therewith to uncouple said mechanism, means' operated by said board in its travel' to control s aid V.bar whereby thel latter is clutched. to said belt at the/initial cutting position of 'said truck to move said carriage transversely.

' 15 'thereof' upon advance of saidtruck and to 1,osa,188

mechanism.

z. 18. In a machine as speciiied in claim 1-7,

means to ret'urnsaid mechanism to initial cutting position.

.19. In a .machinefor severing an advanclng strip of plaster board while' in motion,.-the combination of a moving conveyor beltfor continuously advancing said strip, a cutter truck movable with said belt, a

*cutter carriage transversely movableon said truck, vmeans operated by travel of said release said carriage from transverse movementupon return of said truck, a tractor for coupling said truck to said belt comprising a vgrip bar disposed to be swung into engagement withfsaid belt and to couple said truck thereto. and to be swun'g out of .engagement therewith' tov `uncouple said truck, means operated by saidboard in itsA travel to control said bar wherebyv the latter is clutched to said belt at the initial cutting position vof said truck, and Ameans to release. said' bar at the4 end ofthe cutting pos1t1o"n` 'v of said truck.

.20. In a1 machine as specified inf-claim 19, meansl to return said truck toinitial cutting position. I' 21. In a machine for 'severing an'. advancing` strip of plaster board `While in .motion, the combination of: af moving con- .veyor belt for continuously advancing said1 i strip,a cutter mechanism movable with the belt and` having a .transversely movable cut- I ter, means actuated by travel ot said mecha- 1 nism with said beltv to move said cuttertranslversely thereof, a tractor mechanism for coupling said cutter mechanism to said belt lcomprising a grip bar disposed-'t0 bedepressed against'sald ybelt whereby .to couple said cutting mechanism thereto, means tend- "ing to `cause said bar to be depressed, latch [ineens tending to locksaidbar in elevated a ypositionfout. of engafementwith said belt,

means to elevate sai "in elevated position, means operated by.

'travel of said board to release said bar '.aiid

s funclutch said tractor mechanism from said *l5 belt, and means to returnsaid cutting mec'h- ...anism to initial cutting position.'-

22. vIn a machine for severing an ad-A vancing Strip of plaster board while in motion, the'combination of a moving conveyorlbelt/for continuously advancing said strip,

.a cutter truck movable -fwith said belt, a

' .cutter carriage transversely movable on ysaid truck, means operated by travel of said truck 'i to move saidcarriagetransversely .thereof .grip bar at the outerl l:end lof 4'travel of said cutting mechanism, lsaid latchV meansvthereonglocking said bar mechanism for coupling said truckto said belt comprising a grip bar-disposed to be depressed against said belt. whereby to ycouple .said truck thereto', meansl tending to cause said bar to be depressed, latchment upon return of said truck, a tractor .means tending to lock.said bar in elevated to release said bar and unclutch said tractor means, and means to lreturn said truck to initial cutting position. n

In a machine for severing an advancing strip of plaster board while in motion, the combination of a .moving conveyor belt for continuously advancin said strip, a cutter truck movable withsai belt, a cutter carria e transversely movable Von said truck, a tlg ends to saidtruck, guides fixed `in stationary position, (guides on said truck, 'saidline being p'asse about/said guides to form a bight cfu-said truck and so that -movement of-said truckwill cause the travel of said line on said truck, one way clutch means on`each beat of 'said bight'to vclutch said carriage and moveit transversely upon movement of.the line in one direction .whereby said carriage is moved transversely on advance exiblerline Vanchored at opposite .of said truck,1neans for moving said truck vancing strip of4 p lasterboard' while `in motion, the combination of a moving con` veyor belt for continuousl advancing said strip, a cutter truck mova le with the conveyor belt, facuttencarriage transversely `.movable on said truck, a flexible line anchored atl-'opposite ends to said truck, guides' fixed inxstationary position, guides on said truck, said line being passed about said guides to form a bight on .said truck and movement of saidtruckwill cause travel of said line thereon, one wav .clutch means on each beat of said bight to'clutch said'carriage and .move it transversely upon movement of said line finy one direction, whereby said' carriage is moved transversely. on advance of said` truck, means for .advancing said 4truck with said board` to control movement/of said truck, Aandj means to return said .truck to initial cutting position. Q .Y 25. In a machine for severing an advancing strip of plaster. board while vin motion, the combination' of a moving belt forcon'- tinously advancing said strip,a cutter truck movable with said belt, a cutter vcarriage transversely movable 'on said'truck, a' flex- .ible line anchored'at opposite ends to said truck, guides fixed in stationary position,

said conveyor, means operatd by travelof guides upon said truck, said line being passed about said guides y,to form a bight on said truck and so that movement of said truck will cause travel of said line thereon, one way clutchtmeans on each bestof said bight to clutch said carriage and move it transversely upon movement of said line in one direction whereby said carriage is moved transversely on the advance of said truck, `a.tractor mechanism for coupling-said truck to said belt comprising`a grip bar disposed to, he' -depressed against saidbelt whereby torcouple said truck thereto, means tending to cause said bar to bedepressed, .catch 4means tending to locksaid bar in 'elevated position out of engagement with said belt, means to elevate said bar at the outerend of travel of said truck, said catchmeans thereon locking said bar in. elevated position, means operated by said board iny its travel to release said bar and uncouple said l tractor means, and means to return said truck lto` initial cutting position. y Y

26. In a machine for severing an advancing strip of plaster board while in motion,

` the combination of a moving conveyor belt orcontinuously advancingsaidstrip, a cutter truck movable with the belt, a'cutter carA riage transversely movable on said truck, a chain anchored at opposite ends to said truck, wheels fixed in stationary position,

.wheels on said truck, said chain being passed about said wheelsto form a bight on said 'truck and so that movement of saidtruck will cause travel -of said. chain thereon, coupling fingers on the opposite beats of said tbight, a' c'atch-pi-vo'tallymounted on -said carriage and having oppositely disposed notches to vreceive the correspond-ing fingers forming therewith one way clutch means so as to clutchsaid carriage to said chain and move it transversely upon thef travel of said chain in one direction where-by said carriage is -moved transversely uppn advance of said truck, means for advancing said truck with said conveyor, means to 11e-( turn said truck to initial'cutting position,

and means operated by travel of said board to control the movement of said truck. y y,

27, In a machlne for severing an advancing strip of'plaster board whilein motion,

'the combination of a moving conveyor belt for -continuously ladvancing said strip, al

cutter carriage transversely movable on said truck, a chain anchored at opposite ends to said truck, wheels fixed in stationary position, wheelson said truck, said chain being passed. about said wheels to ferm a bight on said truck so that movement of said truck will 'cause travel of said chain thereon, couplingiingers on the opposite beats of said bighta' catch pivotally mounted'on said carriage and havin-g opposi'telyv disposed 4notches to receive the corresponding fingers forming therewith one way clutch )means so as to clutch said carriage to said chain and move it transversely `upon vtravel of the chain in one` direction whereby the carriage is mpved transversely on the advance of said truc i. f

28/Infa machine-for severing an advancing strip of -plasterboard while v1n motion,-

the combination ofa moving conveyor belt, a truck movable with said belt, a tractor mechanism for coupling said truck lto said belt comprising a grip ,bar disposed to be depressed against said belt whereby Ato couple saidbelt thereto, means tending to cause said bar to be depressed, catch means tending to locksaid bar in elevated position out contingously advancing said strip,fa cutter,

mechanism movable with the conveyor and having a transversely movable cutter, and

means-for ,movingthe cutter with the con- Aveyor, means adapted vto be supported upon the, surface of said strip or .upon the sur-Kv face of said conveyor,`said means controlling movement of Isaid mechanlsm 'with the con- Y veyor;

In witness that. I claim the foregoing' have hereunto subscribed my name this 25th day of'June, 1925. y

, JOHN SCHUMACHER. A 

